Research On Fertilizer Effect Based On The Background Of Intercropping Of Wheat/Corn/Soybean On Anniversary

Intercropping planting pattern set intensive use of land, light, moisture and nutrients as one, which plays an important part in China’s agricultural production. Wheat/corn/soybean cropping pattern is one of the largest area of intercropping cropping patterns promoted in Sichuan Province cropping patterns, which have a significant impact on the Sichuan wheat, corn, soybean production. Phosphate is one of the elements of the three major nutrients required for crop growth. Reasonable application of phosphate fertilizer is not only conducive to crop production, but also environmental pollution problems caused by excessive nitrogen and phosphorus fertilizer application can be avoided. In recent years, research on crop phosphate fertilizer has been a lot of previous studies,but these research are based on a single crop as the research object, or only focus on unilateral aboveground or underground, while Annual crop aboveground plants and belowground soil under intercropping system studied at the same time is still very rare.Therefore, this thesis use wheat/corn/soybean anniversary of the sets of system as research object. By a different amount of phosphorus fertilizer, this paper research on wheat, corn, soybean aboveground plants and belowground soil. We hope to make preliminary recommendations to guide the local agricultural production in Wheat/corn/soybean anniversary of the system of crop production and reasonable application ofP hosphate fertilizer. The main research results are as follows:(1) The application of P fertilizer can significantly promote tillering of wheat, to increase the dry weight of wheat and wheat yield potential. Within a certain range, the yield of wheat increased with increasing phosphate levels, the P treatments were significantly higher than that without P treatments. When the phosphate levels of135kg/ha, continue to increase P fertilizer, wheat production is no longer increasing, but decline, and the edge line to yield is higher than the inside line,with the obvious side-line benefits. The application of P fertilizer can also significantly improve the wheat plant absorption of nitrogen, phosphorus and potassium, while increasing the available phosphorus in the soil.(2) The application of P fertilizer can significantly promote the corn plant height and com leaf area index, to increase the dry matter, to improve maize yield potential. Within a certain range, corn production is increased with the increase of phosphate levels, the P treatments were significantly higher than that without P application.When phosphate levels reach150kg/ha. the output is largest. The application of P fertilizer can also significantly improve the corn plant absorption of nitrogen, phosphorus and potassium, while increasing the available phosphorus in the soil.(3) phosphorus contribute to soybean yield, but soybean demand for phosphorus is less than the wheat and corn.Phosphorus can increase the yield of soybeans in a certain range, but too much is not conducive to soybean yield, so they will yield decreased. After wheat phosphorus45kg/ha, com phosphorus37.5kg/ha, no longer phosphorus applied in soils, Soybean yield is the highest. With the increase in the amount of phosphorus of wheat and corn, soybean processing production is reduced.The same with yield, soybean two treatment nutrient uptake is the largest.(4) In anniversary of the intercropping system of wheat/corn/soybean, when the annual application of P fertilizer is330kg/ha, production and value of intercropping group is the largest respectively, the13921.43kg/ha and37,804.83yuan, but with the anniversary of the phosphorus165kg/ha and phosphorus247.5kg/ha the difference was not significant, Therefore, in agricultural production, the anniversary of the phosphorus165kg/ha is more appropriate.(5) In anniversary of the intercropping system of wheat/corn/soybean, topsoil available P increased with the increase of phosphate levels, available phosphorus content of0-20cm layer is greater than20-40cm layer.Soil available P was mainly enriched in the topsoil, and easily fixed.It downward migration is very slow.(6) In anniversary of the intercropping system of wheat/corn/soybean, the absorption and utilization of phosphate by annual the165kg/ha processing is the largest for17.15%.The utilization of agriculture of phosphate by annual the330kg/ha processing is the largest for6.45kg/kg.